Pseudospin symmetry and spin symmetry in Sn isotopes from the proton drip line to the neutron drip line are investigated in spherical relativistic mean field theory with NLSH force parameter.

Bound states of relativistic particles in the four-parameter diatomic potential with pseudospin symmetry;

Quesne ring-shaped spherical harmonic oscillator potential and pseudospin symmetry

Quesne-like ring-shaped spherical harmonic oscillator potential and pseudospin symmetry

Bound states of relativistic particles moving in the potentials with pseudo-spin symmetry;